Nikki is 25% more efficient that Tina. Tina alone can build a craft in 20 days. Find the number of days taken by Nikki to finish the same piece of work ?

A 16
B 17
C 18
D 19

Correct Answer: 16

The ratio of times taken by Tina and Nikki = 125: 100 = 5: 4.Suppose Nikki takes x days to do the work.5 : 4 = 20 : x so, x = (4x20)/5 = 16 days
Bissoy MCQ
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